Mozilla Thunderbird up to 91.8 Document cross-domain policy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Mozilla Thunderbird up to 91.8. The affected element is an unknown function of the component Document Handler. This manipulation causes cross-domain policy. This vulnerability is handled as CVE-2022-29909. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 91.8 (Mail Client Software). It has been declared as critical. Affected by this vulnerability is an unknown code of the component Document Handler. The manipulation with an unknown input leads to a cross-domain policy vulnerability. The CWE definition for the vulnerability is CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 05/03/2022 by Armin Ebert as Bug 1755081 as confirmed advisory (Website). The advisory is shared at bugzilla.mozilla.org. The advisory contains:

Documents in deeply-nested cross-origin browsing contexts could obtain permissions granted to the top-level origin, bypassing the existing prompt and wrongfully inheriting the top-level permissions.
This vulnerability is known as CVE-2022-29909. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/24/2026).

The vulnerability scanner Nessus provides a plugin with the ID 294768 (MiracleLinux 8 : firefox-91.9.0-1.el8.ML.1 (AXSA:2022-3174:10)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 91.9 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (294768) and EUVD (EUVD-2022-34219). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-domain policy
CWE: CWE-942 / CWE-346 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 294768
Nessus Name: MiracleLinux 8 : firefox-91.9.0-1.el8.ML.1 (AXSA:2022-3174:10)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Thunderbird 91.9

Timelineinfo

04/29/2022 🔍
05/03/2022 +4 days 🔍
05/03/2022 +0 days 🔍
09/30/2022 +150 days 🔍
05/24/2026 +1332 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: Bug 1755081
Researcher: Armin Ebert
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-29909 (🔍)
GCVE (CVE): GCVE-0-2022-29909
GCVE (VulDB): GCVE-100-209941
EUVD: 🔍

Entryinfo

Created: 09/30/2022 10:03
Updated: 05/24/2026 04:05
Changes: 09/30/2022 10:03 (18), 09/30/2022 10:07 (28), 10/26/2022 13:45 (1), 01/21/2026 13:46 (16), 05/24/2026 04:05 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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